I'm wondering if they only showed up in the RC? Because now that I installed the final version I haven't seen them yet. Hmmm..
Dell Dimension E310 desktop, 2.80 GHz, 2 GB DDR2, 500 GB HDD - Linux Mint 17.2 (Mate 32bit)
Acer Aspire One KAV60 netbook, 2 GB DDR2, 120 GB HDD - Ubuntu MATE 15.04 (32bit)